<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: NotExists.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Validate_File_Exists
 */
require_once 'Zend/Validate/File/Exists.php';

/**
 * Validator which checks if the destination file does not exist
 * @category Zend
 * @package Zend_Validate
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Validate_File_NotExists extends Zend_Validate_File_Exists {

    /**
     * @const string Error constants
     */
    const DOES_EXIST = 'fileNotExistsDoesExist';

    /**
     *
     * @var array Error message templates
     */
    protected $_messageTemplates = array(self::DOES_EXIST => "File '%value%' exists");

    /**
     * Defined by Zend_Validate_Interface
     * Returns true if and only if the file does not exist in the set destinations
     * @param string $value Real file to check for
     * @param array $file File data from Zend_File_Transfer
     * @return boolean
     */
    public function isValid ($value, $file = null) {
        $directories = $this -> getDirectory (true);
        if (($file !== null) and ( ! empty ($file['destination']))) {
            $directories[] = $file['destination'];
        } else 
            if ( ! isset ($file['name'])) {
                $file['name'] = $value;
            }
        foreach ($directories as $directory) {
            if (empty ($directory)) {
                continue;
            }
            $check = true;
            if (file_exists ($directory . DIRECTORY_SEPARATOR . $file['name'])) {
                return $this -> _throw ($file, self::DOES_EXIST);
            }
        }
        if ( ! isset ($check)) {
            return $this -> _throw ($file, self::DOES_EXIST);
        }
        return true;
    }

}
